706647261 has 4 divisors (see below), whose sum is σ = 942196352. Its totient is φ = 471098172.

The previous prime is 706647247. The next prime is 706647269. The reversal of 706647261 is 162746607.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 706647261 - 2⁶ = 706647197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (706647269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117774541 + ... + 117774546.

It is an arithmetic number, because the mean of its divisors is an integer number (235549088).

Almost surely, 2^706647261 is an apocalyptic number.

It is an amenable number.

706647261 is a deficient number, since it is larger than the sum of its proper divisors (235549091).

706647261 is a wasteful number, since it uses less digits than its factorization.

706647261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235549090.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 706647261 is about 26582.8377153381. The cubic root of 706647261 is about 890.7056899353.

The spelling of 706647261 in words is "seven hundred six million, six hundred forty-seven thousand, two hundred sixty-one".